Just found out about this: it's a search engine that uses your searches to plant trees. Seems just as on top of things as Google, and of course we can never have enough of those lovely stalwarts of nature, the trees, so I added it to Chrome.

It's a drop in the ocean, but the ripples may have some sort of positive effect. Wiki says after 56 or so searches you'll have earnt them enough to plant a tree, and considering almost everyone I know has gotten into the annoying habit of punctuating their thoughts with a google search of some kind, they could be planting several trees a day. Thought some of you might like to give it a punt.